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From: karn@epic.bellcore.com (Phil R. Karn)
Newsgroups: rec.ham-radio,sci.electronics
Subject: Re: GPS accuracy in wake of Desert Storm?
Message-ID: <1991Jan31.183738@epic.bellcore.com>
Date: 31 Jan 91 23:37:38 GMT
References: <1154.27A2ECFD@w8grt.fidonet.org> <1991Jan29.044137.20914@zoo.toronto.edu> <1321@catnip.berkeley.ca.us> <1991Jan30.232701.25602@amd.com>
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Don't forget that the region also has good Loran-C coverage from two
permanent chains in Saudi Arabia. My own experience with the Northeast
USA Loran-C chain has been repeatable accuracy of 20-40 meters; this
is better than the 100 meter figure given for GPS with selective
availability turned on.

Furthermore, Loran-C is available 24 hours/day, unlike GPS which has
coverage gaps. According to publicly available orbital elements and
operational schedules, there is currently a daily gap in GPS coverage
in the Baghdad area from about 1130 to 1200 UTC. (A gap is defined as
fewer than 4 operational satellites visible simultaneously, including
both Block I and Block II spacecraft.)

Phil